# Fastyn vs 树懒轻断食

The clearest difference is in-app purchases: 树懒轻断食 at none against Fastyn's 3. 树懒轻断食 also leads on update cadence (every 3 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Fastyn sells 3 in-app purchases, starting at $1.99 per 7 days. 树懒轻断食 asks for nothing beyond the download.

Fastyn ships an update every 3 months, 树懒轻断食 every 3 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Fastyn | 树懒轻断食 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 35 MB | 3 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [MANUEL MATAS GALEOTE](https://appshunter.io/developer/1794633190) | [立华 陈](https://appshunter.io/developer/1886656849) |

## What reviewers say

### Fastyn

[App page](https://appshunter.io/ios/app/fastyn-intermittent-fasting/id6744653719)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fastyn Plus Weekly | $1.99 | per 7 days |
| Fastyn Plus Monthly | $3.99 | per month |
| Fastyn Plus Annual | $17.99 | per year |


### 树懒轻断食

[App page](https://appshunter.io/ios/app/and/id6762049386)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Fastyn free?

Fastyn is free to download, with in-app purchases available.

### Is 树懒轻断食 free?

树懒轻断食 is free to download, with no in-app purchases.

### Do Fastyn or 树懒轻断食 have ads?

Neither Fastyn nor 树懒轻断食 shows ads.

### Which is updated more often, Fastyn or 树懒轻断食?

Fastyn ships an update every 3 months, and 树懒轻断食 every 3 weeks. Most recently, Fastyn was updated on November 6, 2026 and 树懒轻断食 on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*